Added Keyword(s) work in the same manner as other keyword search functions, however it only searches for items in the category that you are currently viewing. If you are in the category "Riding Gear & Helmets" and you put in "Shoei" or "shoei" and press the blue button to the right of the keyword box, it will narrow your selection to only Shoei products. You can narrow your selection even further by putting in "Helmet" or "helmet" or you could put in "Shoei Helmet" at first to reduce the number of steps. If you narrow your search too far, just select the orange circle with the white x in it above the keyword box and click on the search term you want to remove.